No, it was taken out because 88's are not meant to counter ATG's and ATG's are not meant to counter 88's.
Hm. I admit I havent played for very long, but in the games I have played ATG's counter eachother disturbingly well (atg vs atg sniper wars ftw). Is that not meant to be either? Sorry for the questions, it's just that I'm having a bit of a hard time seeing a red thread throughout the balancing and design decisions in the mod.
Edit; The above is perhaps slightly relevant in the sense that an 88 (in theory) fulfills the role of a very powerful static AT gun.